Ignition "OFF" & Engine "OFF".

Disconnect VSS connector.

Remove VSS and Driven gear from Transaxle.

Visually check that VSS driven gear is in good condition.

Monitor signal waveform by rotating VSS driven gear with hand after connect connector to VSS.

Is the signal waveform generated from VSS ?

YES

▶ Substitute with a known-good ECM and check for proper operation.

If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.

NO

▶ Check VSS for contamination, deterioration, or damage. Substitute with a known-good.

VSS and check for proper operation. If the problem is corrected, replace VSS and then go to "Verification of Vehicle Repair" procedure.